Individually Owned: 150,657
Corporate Owned: 137,281
Lawrenceville Airport
Aircraft Accident/Incident Report
Lawrenceville, Illinois 62439
Monday, February 15, 1999 15:15 CST
NTSB Narrative Summary Released at Completion of Accident
During climb-out both pilots heard a pop from the right side of the aircraft under the right seat. The CFI performed a landing gear extension. The left landing gear would extend and lock, but the right main gear would extend partially and then retract simultaneously as the left main landing gear would lower and lock. The manual landing gear extension procedures were tried, but the right main landing gear failed to extend. An emergency landing was attempted. The airplane veered off the right side of the runway during the landing rollout. The right wing and right horizontal stabilizer were damaged when they impacted the ground. The examination of the right main landing gear actuator assembly revealed the actuator body was cracked in two locations near the cups for the bearings. One of the cracks had fatigue striations that originated at the corner formed by the intersection of the 2.25 inch inner-diameter surface of the gear housing and the 1.0 inch inner-diameter surface of the linear actuator portion of the actuator housing. The examination of the corner revealed the presence of circumferential scouring marks consistent with grinding or filing marks. The maintenance logbooks indicated that the landing gear actuator was originally equipped on the airplane and had a total of approximately 7,000 flight hours and 21,000 cycles. There is no life or component time limit listed for the component by the airplane manufacturer.
NTSB Probable Cause Narrative
the fatigue fracture of the landing gear actuator.
Event Information
| Type of Event | Accident |
| Event Date | 2/15/1999 |
| Event Day of the Week | Monday |
| Time of Event | 1515 |
| Event Time Zone | Central Standard Time |
| Event City | LAWRENCEVILLE |
| Event State | ILLINOIS |
| Event Country | -- |
| Zipcode of the event site | 62439 |
| Event Date Year | 1999 |
| Event Date Month | 2 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | LAWRENCEVILLE AIRPORT |
| Event Location Nearest Airport ID | LWV |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | 430 |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1453 Eastern Standard Time |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | LWV |
| Elevation of weather observation facility | 430 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | EST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 13 |
| Dew Point at event time (in degress fahrenheit) | 0 |
| Wind Direction (degrees magnetic) | 180 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 15 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 30 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 526 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Feb 15 1999 12:00AM |
| NTSB Notification Time | 2006 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 12 2000 11:20AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N9506D |
| NTSB Number | CHI99LA092 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Cessna |
| Aircraft Model | 172RG |
| Aircraft Series Identifier | 172RG |
| Aircraft Serial Number | 172RG1191 |
| Certified Max Gross Weight | 2550 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 4 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Jan 20 1999 12:00AM |
| Airframe hours since last inspection | 32 |
| Airframe Hours | 7024 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | VINCENNES UNIVERSITY |
| Aircraft Owner Street Address | 1002 NORTH 2ND. ST. |
| Aircraft Owner City | VINCENNES |
| Aircraft Owner State | IN |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 47591 |
| Operator is an individual? | -- |
| Operator Name | |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | |
| Operator City | |
| Operator State | |
| Operator Country | |
| Operator Zip code | |
| Operator Code | |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | -- |
| Indicates Domestic or International Flight | -- |
| Operator carrying Pax/Cargo/Mail | -- |
| Type of Flying (Per_Bus / Primary) | Instructional |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | Yes |
| Departure Airport Code | LWV |
| Departure City | |
| Departure State | |
| Departure Country | |
| Departure Time | 1400 |
| Departure Time Zone | EST |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Takeoff |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:30AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 18 |
| Runway Length | 5200 |
| Runway Width | 100 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |